STUDY OF ASPHALT VISCOSITY TESTING AT 60 F

A COOPERATIVE STUDY AMONG SIX LABORATORIES HAS DEFINED TEST CONDITIONS TO MINIMIZE DIFFERENCES IN RESULTS OBTAINED BY DIFFERENT LABORATORIES USING FOUR DIFFERENT INSTRUMENTS FOR DETERMINING THE VISCOSITY OF ASPHALT AT 60 F (16 C). THE METHODS-CONE-PLATE, FALLING PLUNGER, SLIDING PLATE, AND SLIDING PLATE AT CONTROLLED RATE OF SHEAR-ARE ALL CURRENTLY PROPOSED FOR THE BOOK OF ASTM STANDARDS,PART II. THE STUDY SHOWS THAT ADHERING CLOSELY TO SPECIFIED TEMPERATURES AND TIMES IN SAMPLE PREPARATION AND USING A UNIFORM VISCOSITY LOADING SEQUENCE WILL DECREASE THE VARIABILITY IN RESULTS AMONG LABORATORIES AND METHODS. A LOADING SEQUENCE GOING FROM LOW TO HIGH GIVES VISCOSITIES ABOUT 8 TO 9 PERCENT HIGHER THAN THOSE OBTAINED WITH A REVERSE SEQUENCE. THESE RESULTS ARE THE GROUNDWORK FOR A FUTURE STUDY OF PRECISION. /AUTHOR/

• Supplemental Notes:
  • ASTM STP 532
• Authors:
  • Evans, J V
  • Gorman, J W
• Publication Date: 1973-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 16-27
• Serial:
  • ASTM Special Technical Publications
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Accuracy; Asphalt tests; Laboratory studies; Loads; Methodology; Shear strength; Temperature; Viscosity
• Uncontrolled Terms: Loading
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211834
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 27 1974 12:00AM